Property and Equipment

9 Months Ended

Sep. 28, 2019

Property, Plant and Equipment [Abstract]

8. Property and Equipment

Property and equipment, net, consists of the following (in thousands):



	September 28, 2019			December 29, 2018
Building and building improvements	$	91,704		$	88,449
Machinery and equipment	58,582			54,525
Land	40,216			23,762
Aircraft and vehicles	28,818			25,555
Computer equipment	19,214			16,582
Leasehold improvements	17,574			16,428
Tooling	15,070			14,212
Furniture and office equipment	10,708			10,459
Demonstration units	792			470
Construction-in-progress (CIP)	37,309			13,320
Total property and equipment	319,987			263,762
Accumulated depreciation	(110,529		)	(97,790		)
Property and equipment, net	$	209,458		$	165,972

For the three months ended September 28, 2019 and September 29, 2018, depreciation expense of property and equipment was $4.8 million and $4.0 million, respectively. For the nine months ended September 28, 2019 and September 29, 2018, depreciation expense of property and equipment was $14.3 million and $12.1 million, respectively.

During the nine months ended September 28, 2019, the Company, through its wholly owned subsidiaries, completed the purchase of two buildings for an aggregate purchase price of $35.6 million.

The balance in CIP at September 28, 2019 relates primarily to a recently purchased building and capitalized implementation costs related to a new enterprise resource planning software system, the underlying assets for which have not been completed or placed into service. The balance in CIP at December 29, 2018 related primarily to capitalized costs associated with the implementation of a new enterprise resource planning software system and a capital improvement project at its corporate headquarters, the underlying assets for which had not been completed or placed into service.